ceph/src/rocksdb/java/rocksjni/trace_writer_jnicallback.h

   1 //  Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
   2 //  This source code is licensed under both the GPLv2 (found in the
   3 //  COPYING file in the root directory) and Apache 2.0 License
   4 //  (found in the LICENSE.Apache file in the root directory).
   5 //
   6 // This file implements the callback "bridge" between Java and C++ for
   7 // rocksdb::TraceWriter.
   8
   9 #ifndef JAVA_ROCKSJNI_TRACE_WRITER_JNICALLBACK_H_
  10 #define JAVA_ROCKSJNI_TRACE_WRITER_JNICALLBACK_H_
  11
  12 #include <jni.h>
  13 #include <memory>
  14
  15 #include "rocksdb/trace_reader_writer.h"
  16 #include "rocksjni/jnicallback.h"
  17
  18 namespace rocksdb {
  19
  20 class TraceWriterJniCallback : public JniCallback, public TraceWriter {
  21  public:
  22     TraceWriterJniCallback(
  23         JNIEnv* env, jobject jtrace_writer);
  24     virtual Status Write(const Slice& data);
  25     virtual Status Close();
  26     virtual uint64_t GetFileSize();
  27
  28  private:
  29     jmethodID m_jwrite_proxy_methodid;
  30     jmethodID m_jclose_writer_proxy_methodid;
  31     jmethodID m_jget_file_size_methodid;
  32 };
  33
  34 }  //namespace rocksdb
  35
  36 #endif  // JAVA_ROCKSJNI_TRACE_WRITER_JNICALLBACK_H_